2023 Volume 40 Issue 1 Pages 19-
A compressor rupture accident may occur because of erroneous operation during the pump-down of residential split air conditioners. An engine for a model airplane was used to simulate a refrigerant compressor, and experiments were conducted on the diesel combustion of mixtures of refrigeration oil, refrigerant, and air. The effect of the reaction inhibitor concentration in the refrigeration oil on combustion suppression was investigated. The refrigeration base oil was polyol ester, and four additives were used. The refrigerants used were R 22, R 32, R 1234yf, and R 290. The combustion range became narrower, and the maximum pressure decreased as the concentration of the additive increased. Additive A4 showed a suppression effect on many refrigerants even when one wt% was added. In particular, for R 290 and R 1234yf, the concentration range of diesel explosions was significantly reduced.
